Nodemailer OAUTH Gmail connection (Error: connect ETIMEDOUT 74.125.140.108:465) - oauth-2.0

Question

Im trying to use OAUTH 2.0 to send emails with Gmail API using Nodemailer
I have Enable the Gmail API and i have clientId, clientSecret, refreshToken and accessToken (refreshtoken and accesstoken were taken from developers.google.com/oauthplayground) because these all were needed for OAUTH to work.
i have followed every detail form (https://nodemailer.com/smtp/oauth2/#examples)
But i'm getting following error
{ Error: connect ETIMEDOUT 74.125.140.108:465
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1097:14)
errno: 'ETIMEDOUT',
code: 'ESOCKET',
syscall: 'connect',
address: '74.125.140.108',
port: 465,
command: 'CONN' }
But there is a catch when i use Plain username and password there is no connection timeout error because i have already enabled less secure app access form (https://myaccount.google.com/lesssecureapps) so there is no error in sending emails using plain username and password but this is not a good approach so OAUTH is the solution
here is my code for you to check (its an express app) running in development running on http://localhost:3000
var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport({
host: 'smtp.gmail.com',
port: 465,
secure: true,
service: 'gmail',
auth: {
type: 'OAuth2',
user: 'mygmailaddress#gmail.com',
clientId: 'clientID',
clientSecret: 'clientSecret',
refreshToken: 'refresh token obtained from https://developers.google.com/oauthplayground',
accessToken: 'access token also obtained from https://developers.google.com/oauthplayground'
}
});
var mailOptions = {
from: 'me <myemailaddress#gmail.com>',
to: '',
subject: 'Subject ',
text: 'Some thing',
};
transporter.sendMail(mailOptions, (error, response) => {
if(error){
console.log(error); // Always giving Error: connect ETIMEDOUT 74.125.140.108:465
} else {
console.log(response);
}
});
it not even try to login because when login fails it gives error of wrong credentials (checked with plain username and password)
*Note please don't mark this question as duplicate because i have check almost all other question and answers but nothing worked
some people said its because of firewall setting i have check that too but didn't worked
So whats the issue and how to solve it

Answer 1

Your port no is wrong for gmail. Use This Format for gmail
const nodeMailer = require('nodemailer');
let transporter = nodeMailer.createTransport({
host: "smtp.gmail.com",
port: 587,
secure: false, // true for 587, false for other ports
requireTLS: true,
auth: {
user: your email,
pass: your password,
},
});
let mailOptions = {
from: 'from#gmail.com',
to: 'to#gmail.com',
subject: 'Sending Email using Node.js',
text: 'That was easy!'
};
transporter.sendMail(mailOptions, function(error, info){
if (error) {
console.log(error);
} else {
console.log('Email sent: ' + info.response);
}
});

Answer 2

After looking to your problem i assume that when generated the OAuth credentials e.g(clienId and Clientsecret ) you did not added https://mail.google.com/ in you scope on connect screen because you would need verification form google to add these scope for the credentials
you must have added this to your scope on (https://developers.google.com/oauthplayground) but i'm sure you have add this to your scope on consent screen as well before generating credentials
OAuth consent screen
as you are in Development mode and running your application on localhost so you don't have private domain and privacy policy
Adding https://mail.google.com to your scope before generating clientId and Cliensecret will resolve your problem